[1] They include apologetic works against the heresies of the Arians, Donatists, Manichaeans and Pelagians; texts on Christian doctrine, notably De Doctrina Christiana (On Christian Doctrine); and exegetical works such as commentaries on Book of Genesis, the Psalms and Paul's Letter to the Romans; along with many sermons and letters.
Apart from those, Augustine is probably best known for his Confessions, which is a personal account of his earlier life, and for De civitate dei (The City of God, consisting of 22 books), which he wrote to restore the confidence of his fellow Christians, which was badly shaken by the sack of Rome by the Visigoths in 410.
Towards the end of his life (c. 426–427), Augustine revisited his previous works in chronological order in the Retractationes.
In fact, the Latin title literally means "re-treatments", and though in this work Augustine suggested what he would have said differently, it provides little in the way of actual "retraction".
[2] The chronology of Augustine's work is in many cases uncertain, and scholarly estimates of dates may differ.